Operational Description

FCC ID: F34STRIDE2400-STS

Operational Description

Download: PDF
FCCID_367444

Below is a brief description of the remote terminal station (CPE) basic functions.
Refer to Function diagram for better understanding.



Wireless Terminal
The Wireless Terminal provides all the major communication function required at or near the subscriber
site. It incorporates the following functions:
Radio transceiver,
Radio Controller (Asic Array),
Terminal controller (RTS Wireless Terminal Motherboard),
POTS interfaces,
Optional Broadband data Interface,
DC/DC power supply and power conversion
Indirect lightning protection of the interfaces and power input port,
Maintenance and configuration port.



Radio transceiver
The Wireless Terminal provides the radio transceiver function for communicating with
the base station radio. It provides the output port for connecting the RF Antenna cable to
the third party external antenna. The appropriate antenna can be selected to provide the
gain required based on the distance from the base station antenna tower.
The 2.4GHz radio provides a dynamic power control features to ensure the uniformity of
the received power level at the radio base station, initially at startup but continuously
after. The process will be periodically verified and adjusted to compensate for setup
condition, traffic conditions and path loss changing conditions, temperature effect and
aging, by the radio controller. The settable range is from -36dBm to +26dBm depending
on the receive level at the base station. The power output is adjusted in 0.5 dB steps.
The output power level is adjusted based on the information received from the base
station updates every 12mS for active terminals and up to every 1.5 seconds for inactive
channels. Between base station updates, the power is adjusted based on the receive signal
level from the base station, and look tables using the transmitter level indication, the
temperature monitor, and the output frequency, the number of CDMA channels to be
transmitted and previous updates.


Radio controller (ASIC Array)
The radio controller provides the platform for the digital processing of an integrated RF
modem terminal decoding multiple 32Kbit CDMA access channels using a proprietary
Integrated Modem ASIC design. The ASIC Array board uses a DSP, 12 modem ASICs,
and 2 FPGAs for normal operation. One FPGA provides summation of 5 TX I/Q
channels to the dual DAC and one provides the timing recovery and data distribution
other board and slave ASIC. The radio controller interfaces with the transceiver and the
motherboard and provides the initial timing of the system and has the control of the
Radio board for Transmit power level, AGC parameter and synthesizer.


Errored Burst Treatment.

When a burst carrying voice band traffic is lost due to error, the radio controller replays
the last burst to the voice interface channel when the channel carry PCM traffic till a
valid burst is received and inserts a null to the voice channel when the channel carries
ADPCM traffic.
When a burst-carrying packet switched is lost due to error, the radio controller discards
the packet.


Terminal controller (RTS Wireless Terminal Motherboard)
This is the main controller of the Remote Terminal Station, motherboard. The
motherboard interfaces with the ASIC Array card, Voice Module card, ADSL card and
Radio card and supplies power to the entire Terminal Station cards.
The motherboard provides POTS interface, management interface and power protection
and also manages the detection, configuration, acquisition and LED indication. It
provides user control access via the management interface.

POTS interfaces.
The Wireless Terminal provides the hardware and software function to provide two 2-
wire POTS interface.
The second voice interface is not a hardware option and is provided by default by the
terminal. However it is possible to disable the functionality of the 2 POTS interface via
NMS.
The default voice channels are “toll quality” at 32 Kbps. The algorithm is Adaptive
Differential Pulse Code Modulation (ADPCM).
Each 2-wire POTS interface is software configurable to enable V.90 voice band data
capability. The 2.4GHz system supports the establishment of Pulse Code Modulation
PCM 64Kbps voice channels for each of the WT voice lines.
When enabled, the system uses modem/ fax tone detection to accomplish automatic
switching from the default 32 Kbps ADPCM to 64Kbps PCM voice channel upon
detection.

Broadband Data Module Interface (optional)
The broadband data module provides the following functions:
Provides a G.lite DSL/ATM CO line card function to support the connection of standard ADSL modem at
the subscriber premise.
Provides a packet channel interface with the Wireless Terminal controller board to carry the user data.
Provides a control plane interface to carry operational control signal/messages from the WT main board to
the module-processing unit.
Provides a management plane interface to allow configuration, maintenance and performance monitoring
well as software download to the Broadband data module.


The Wireless Terminal provides a means to test the packet channel radio connection from a 10BaseT or
10/100BaseT port with a laptop computer isolated from the broadband data module. That should ease
installation and troubleshooting.


Maintenance and configuration port
The Wireless Terminal unit can be controlled through the RS-232 console port for setup
installation alignment, frequency selection and maintenance.
The connectors will be a DB-9 on both ends.
The Wireless Terminal has a 10BaseT connection in addition to the RS-232 port.
The RTS provides a relative signal strength indication to a PC interface for antenna
installation and alignment in addition to the DVM output.
The Wireless Terminal provides a 10BaseT port allowing establishing a PPP connection
form the laptop computer over the VLAN when enabled or control channel. This will
enable accessing WEB sites, HDT NMS port/ configuration, or CO network remotely
using a laptop computer. The port shall be routed to be accessible from the access panel.


DC/DC power supply and power conversion
The Wireless Terminal operates from a battery providing a nominal voltage of 24Volts
DC connected directly to the unit. The input current is 2A max and the voltage can range
from +15V to +28V.
The Multi-Output Fly-back converter provides regulated +3.3V+6.2V, -6.2V, +12V and –
12V to supply the motherboard and all related interface. This module is fused on the DC
power input while the buck converter provides the +8.2V to power the PA.
The Wireless Terminal monitors the AC outage. The power failure will be reported to the
operator at the beginning of the battery base operation for AC ON/ OFF indication.


Indirect lightning protection of the interfaces and power input port
The Wireless Terminal has an electrical protection for indirect lightning protection of the
telephone pairs, and terminal block with screw type connector for the connection of up to
2 user interface cable pairs (2 phone lines). 2 telephone lines available with replaceable
lightning protection gas tubes kit installed.
The Wireless Terminal holds an electrical protection for indirect lightning protection of
the DC power lines and terminal block with screw type connector for the connection of
up to 4 power supply conductors (2 + and 2 -). This will allow to more easily connecting
several pair in parallel to power the unit.


                                                                                                                        WT Functions Basic Overview

                              Wireless Terminal

                                    Management I/F                                       Equipment              System
                                                                                        management:         Synchronization &
                                                                                                                Timing
                                        Craft I/F                                     Detection,
                                                              Configuration
                                                                                    Configuration,
                                                                Interface
                                                                                    Acquisition and
                                                                                    Authentication
                                      Console I/F
                                                                                    LED Indication




                                                                                                            Call Management


POTS Equipment                                                                                                    Call
    Phone                                                                      POTS                            Processing
 V.90 Modem                                                                   Line I/F                        Connection
     FAX                                                                                                      management
Smart Payphone                        Protection
                                          &
                                     Termination
POTS Equipment                                                                                                  Voice
    Phone                                                                       POTS
                                                                                                             Compression &                        TDM Switch
 V.90 Modem                                                                    Line I/F
                   Filter                                                                                        Tone                               fabric
     FAX                                                                                                      processing
Smart Payphone

                                                                                  Broadband data function
                                                           Filter                                                                              Management
                                                                                                                                              and Control I/F
G.LITE Modem
                                                                                                                                              VLAN Access
                                                           ATM            Transparent                                 VLAN Session
                                                                                                                                                Protocol
                                                        ATM OA&M           Bridging &
                                     G.LITE I/F                                                    PPPoE Server
                                                          Traffic         PPPoE relay
                                                        management         over ATM                                       Queuing            Packet Channel




                                        RF Transceiver

                                                                              Power        Pilot      BER       User, Control and             TDM &
                                                                              Control                          Management plane I/F            packet
                                                                                                                   (Control , Signaling       channel
                                                                                                                     ADPCM/ PCM
                                      Analog                                                                          Packet Data)
                 Protection                               DAC/
                                  Intermediate
                                                          ADC
                                    frequency                                                                                                                     Power
                                                                                                       Access Protocol I/F &                                      Supply
                                    Relative                                                          Data Link Layer Framing
                                     Signal
                                    Strength
                                   Test Point
                                                                                                                                                                   Power
                                                     Channel
                                                                                DSSS / CDMA                                           Forward                     Supply
                                                    Summation                                                  QPSK
                                  Burst timing                                 Code spreading/                                         Error                    Protection &
                                                      Signal                                                  MODEM
                                                                                 despreading                                         Correction                  Terminals
                                                    Conditioning



Document Created: 2003-10-23 07:19:19
Document Modified: 2003-10-23 07:19:19

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC